Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » hanh trinh, hanh trang, lanh tranh
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tuan cu » tuan tu, quan cua, tuan thu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((hanh tranh) or (canh tranh)) cua thong ((cong tan) or (cong san)) tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((hanh tranh) OR (canh tranh)) cua thong ((cong tan) OR (cong san)) tuan cu.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((hanh tranh) or (canh tranh)) cua thong ((cong tan) or (cong san)) tuan cu*.